JPH0874880A - Clutch operating device - Google Patents

Abstract

PURPOSE: To improve the operability of a clutch body in an incomplete clutching area without causing any trouble. CONSTITUTION: A cam mechanism 15 as a motion transmitting mechanism for reducing the stroke of the release fork lever 11 of a clutch body 10 to the stroke of a clutch pedal 12 in an incomplete clutching area to transmit the motion of the push rod 14 of a clutch booster 13 for boosting the operating force of the clutch pedal 12 to operate the release fork lever 11 to the release fork lever 11 is interposed between the release fork lever 11 and the push rod 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch operating device having improved clutch operability in a half clutch region.

[0002]

2. Description of the Related Art Conventionally, in a clutch equipped with a clutch booster that boosts the pedaling force of the clutch pedal, the stroke of the clutch pedal and the stroke of the clutch booster (the stroke of the push rod of the clutch booster) ) And 1) are set to be in proportion to each other, the clutch connection / disconnection speed is determined by the speed at which the clutch pedal is depressed. Therefore, in order to facilitate the operation in the half-clutch region where delicate control is required, it is necessary to set the total stroke of the clutch pedal to be somewhat long.

On the other hand, in a clutch of an automatic transmission equipped with a clutch release cylinder, the clutch
The release cylinder swings the release fork lever of the clutch body to connect and disconnect the clutch, and the clutch control solenoid valve that controls the amount of air sent to the clutch release cylinder allows delicate half-clutch operation. It is possible from the to the speed change operation.

[0004]

However, each of the above-mentioned clutch operating devices has the following problems.

That is, in the clutch operating device equipped with the clutch booster, the total stroke of the clutch pedal is set to be long, which inevitably causes a problem that the movement of the driver's leg portion becomes large.

Further, in a clutch operating device equipped with a clutch release cylinder, in order to obtain a smooth start, in order to finely control the clutch release cylinder in the half clutch region, It is necessary to incorporate a solenoid valve with a small throttle diameter into the control solenoid valve, which increases the number of solenoid valves and increases the cost.
This also increases the number of wire harnesses and complicates the CPU circuit and control software.

Therefore, the present invention provides a clutch operating device capable of improving operability in a half-clutch region without causing troubles such as a large movement of a driver's leg or an increase in cost. The purpose is to provide.

[0008]

In order to achieve the above object, according to the invention of a clutch operating device described in claim 1, the release fork lever of the clutch body and the pedaling force of the clutch pedal are boosted. Between the push rod of the clutch booster for activating the release fork lever and the stroke of the release fork lever with respect to the stroke of the clutch pedal in the half clutch region. It is characterized by interposing a motion transmission mechanism that transmits the movement of the push rod to the release fork lever.

According to the invention of the clutch operating device described in claim 3, the release fork lever of the clutch body and the clutch release which is connected to the release fork lever and controls connection and disconnection of the clutch mechanism.・ Release the movement of the clutch release cylinder for the piston rod by reducing the stroke of the release fork lever relative to the stroke of the clutch release cylinder in the half-clutch area between the cylinder and the cylinder. It is characterized by interposing a motion transmission mechanism for transmitting to.

[0010]

According to the first aspect of the invention, the stroke of the clutch pedal in the half-clutch region is provided by the motion transmission mechanism interposed between the release fork lever of the clutch body and the push rod of the clutch booster. On the other hand, the stroke of the release fork lever is reduced, and therefore, even if the stroke of the clutch pedal is reduced, the controllability in the half-clutch region does not deteriorate.

According to the invention of claim 3, the release fork lever and the clutch
Due to the motion transmission mechanism interposed between the release cylinder and the release cylinder, the release
The fork lever moves slowly, and a slow and smooth start can be realized without providing a clutch control solenoid valve for controlling the amount of air sent to the clutch release cylinder with a solenoid valve having a small throttle diameter.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

1 to 4 show a first embodiment of the present invention. FIG. 1 is a schematic configuration diagram of an entire clutch control system equipped with a clutch operating device according to a first embodiment of the present invention, FIG. 2 is a schematic enlarged side view of the motion transmission mechanism portion shown in FIG. 1, and FIG. 2 is a schematic enlarged side view showing a modified example of the motion transmission mechanism shown in FIG. 2, and FIG. 4 is an explanatory view for explaining the relationship between the stroke of the release fork lever and the stroke of the clutch pedal.

In the clutch operating device of the first embodiment, as shown in FIG. 1 and FIG.
Between the fork lever 11 and the push rod 14 of the clutch booster 13 which operates the release fork lever 11 by boosting the pedaling force of the clutch pedal 12, the clutch pedal 12 of the clutch pedal 12 is operated in the half clutch region. A cam mechanism 15 is interposed as a motion transmitting mechanism for transmitting the movement of the push rod 14 to the release fork lever 11 so as to reduce the stroke of the release fork lever 11 with respect to the stroke.

The cam mechanism 15 is fixed to the push rod 14, and has a plate-like cam member 16 that moves linearly by the push rod 14 and the release fork lever 1.
A cam follower 17 provided at the free end portion of No. 1 and engaged with a cam groove 16a provided in the cam member 16 in a rotatable and slidable manner
And the movement of the push rod 14 in the cam groove 16
It is configured to be transmitted to the release fork lever 11 via the engagement of a with the cam follower 17.

Here, the cam groove 16a is formed by the stroke of the clutch pedal 12 and the release fork lever 11.
Is formed so as to have a relationship as shown by the solid line in FIG. That is, the cam groove 16a is an inclined long groove provided along the length direction of the cam member 16, and an intermediate portion thereof corresponding to the half-clutch region is formed to be bent with respect to other portions. The dotted line in FIG. 4 shows the conventional case where the stroke of the clutch pedal 12 and the stroke of the release fork lever 11 have a 1: 1 relationship.

The clutch pedal 12 is equipped with a master cylinder 18 and an oil reservoir 19. When the clutch pedal 12 is depressed, the oil in the oil reservoir 19 is directly clutched from the master cylinder 18. -It is pumped to the control valve part 19 of the booster 13.

The clutch booster 13 boosts the pedaling force of the clutch pedal 12 using, for example, hydraulic pressure and air pressure, and is operated directly by the hydraulic pressure from the master cylinder 18 to generate compressed air proportional to the hydraulic pressure. A control valve portion to be sent to the power cylinder portion, a power cylinder portion that generates a boost by the compressed air, and a hydraulic pressure from the master cylinder 18 are converted into a force, and a boost force generated in the power cylinder portion. Is transmitted to the release fork lever 11 via the push rod 14 and a hydraulic cylinder portion.

In FIGS. 2 and 3, reference numeral 20 is a release fork mounted in the clutch body 10 and is rocked by the release fork lever 11 to push the release lever against the clutch spring. Disengage or engage the clutch.

According to the clutch operating device of the first embodiment described above, when the clutch pedal 12 is depressed, the pushing force is boosted and the push rod 14 of the clutch booster 13 moves forward, and the push rod 14 moves forward. The forward movement is converted into rotational movement through engagement between the cam groove 16a of the cam member 16 and the cam follower 17 and is transmitted to the release fork lever 11, and the release fork lever 11 rotates to release. The clutch pedal 12 is disengaged by depressing the clutch body 10 via the fork 20 or the like.
When the foot is released from, the clutch body 10 is connected by making a movement opposite to the previous movement.

In this clutch operation, in the intermediate clutch half-clutch region, the stroke of the release fork lever 11 is smaller than the stroke of the clutch pedal 12, which facilitates control of the clutch body 10. . Therefore, the controllability in the half-clutch region is not impaired even if the total stroke of the clutch pedal 12 is not set to a large value as in the conventional case. In other words, the entire stroke of the clutch pedal 12 can be set shorter than before, and the movement of the driver's legs can be reduced.

FIG. 3 shows a modified example of the cam mechanism 15. According to this modified example, instead of the cam member 16 which moves straight and backward by the push rod 14, the case of the transmission is replaced by the push rod 14. A cam-shaped cam member 22 that rotates about a pin 21 fixed to the outer surface as a fulcrum is provided, and a cam surface 22a formed on the outer periphery of the cam member 22.
The cam follower 17 provided at the free end of the release fork lever 11 is brought into contact with the push rod 1
4 moves forward and backward, the cam surface 22a of the cam member 22
The release fork lever 11 is rotated clockwise and counterclockwise through the contact between the cam follower 17 and the cam follower 17. Here, the cam surface 22a is formed such that the stroke of the release fork lever 11 is smaller than the stroke of the clutch pedal 12 at a location corresponding to the half-clutch region.

5 to 8 show a second embodiment of the present invention. FIG. 5 is a schematic configuration diagram showing an outline of a mechanical automatic transmission equipped with a clutch operating device of a second embodiment of the present invention, FIG. 6 is a schematic enlarged side view of the motion transmission mechanism portion shown in FIG. 5, and FIG. FIG. 8 is a schematic enlarged side view showing a modified example of the motion transmission mechanism shown in FIG. 6, and FIG. 8 is an explanatory diagram illustrating the relationship between the stroke of the release fork lever and the stroke of the clutch release cylinder. 5 to 8, the same parts as those in FIGS. 1 to 4 are designated by the same reference numerals.

In the clutch operating device according to the second embodiment, the release fork lever 11 of the clutch body 10 and
Between the release fork lever 11 and the clutch release cylinder 23 that controls connection and disconnection of the clutch body 10, the release fork with respect to the stroke of the clutch release cylinder 23 in the half clutch region.・ Releasing the movement of the piston rod 24 of the clutch release cylinder 23 by reducing the stroke of the lever 11 ・ Fork lever 11
A cam mechanism 25 as a motion transmitting mechanism for transmitting to the motor is interposed.

The cam mechanism 25 is fixed to the piston rod 24 in the same manner as in the first embodiment described above, and the piston
A plate-shaped cam member 26 that linearly moves by the rod 24;
A cam follower 27 is provided at the free end of the release fork lever 11 and is rotatably and slidably engaged with a cam groove 26a provided in the cam member 26. The cam groove 26a and the cam follower 27 are provided. Through the engagement of the piston
It is configured to transmit the movement of the rod 24 to the release fork lever 11. Here, the cam groove 26a
Is the stroke of the piston rod 24 of the clutch release cylinder 23 and the release fork lever 1
The stroke 1 is formed so as to have the relationship shown by the solid line in FIG. That is, the cam groove 26a is formed by the cam member 2
6 is an inclined long groove provided along the length direction of 6, and an intermediate portion corresponding to the half-clutch region is formed to be bent with respect to other portions. The dotted line in FIG. 8 shows the conventional case where the stroke of the piston rod 24 of the clutch release cylinder 23 and the stroke of the release fork lever 11 have a 1: 1 relationship.

The mechanical automatic transmission shown in FIG. 5 is for releasing the driver from frequent gear shifting operations, and the transmission 28 is attached to the flywheel at the end of the crankshaft via the clutch body 10. The gear ratio of the transmission 28 is selected by the controller 29. The controller 29 drives the above-mentioned clutch release cylinder 23 that controls connection and disconnection of the clutch body 10, the shift actuator 30 that controls a combination of gears, and the like. The clutch stroke sensor 31, the gear position Various sensors such as an axle opening sensor are connected to the outside of the sensor 32 and the like.

The clutch release cylinder 23 uses the air supplied through the air compressor 33, the reservoir tank 34, the pressure reducing valve 35, the control tank 36 and the clutch control solenoid valve 37 as a working fluid, and releases the clutch. The fork lever 11 is operated to connect and disconnect the clutch body 10.

The clutch control solenoid valve 37 is composed of a plurality of solenoid valves having different throttle diameters, and the plurality of solenoid valves are sequentially and selectively opened in the process of shifting the clutch body 10 from the disengaged state to the connected state. By releasing the valve, the clutch release
A half-clutch operation can be performed by controlling the amount of air sent into the cylinder 23.

According to the clutch operating device of the second embodiment, the controller 29 opens and closes the clutch control solenoid valve 37 to supply the pressurized air from the air compressor 33 to the clutch release cylinder 23 or the clutch release. -Exhaust air from the cylinder 23. As a result, the piston rod 24 moves forward or backward, and the forward and backward movements of the piston rod 24 are converted into rotational movement through the engagement of the cam groove 26a of the cam member 26 of the cam mechanism 25 and the cam follower 27. It is converted and transmitted to the release fork lever 11, and the release fork lever 11 rotates to change the clutch main body 10 from the disconnected state to the connected state or from the connected state to the disconnected state via the release fork 20 and the like.

In the half-clutch region, which is the intermediate process of the clutch operation, the stroke of the release fork lever 11 is smaller than the stroke of the piston rod 24 of the clutch release cylinder 23 by the cam mechanism 25. That is, even if the piston rod 24 of the clutch release cylinder 23 moves fast in the half-clutch region by the cam mechanism 25, the movement of the release fork lever 11 is slowed and the vehicle can be slowly started. In other words, in order to slowly move the piston rod 24 of the clutch release cylinder 23, it is not necessary to dispose a plurality of solenoid valves having a small throttle diameter in the clutch control solenoid valve 37.
It is possible to reduce the cost by reducing the number of solenoid valves incorporated in the clutch control solenoid valve 37. If the number of solenoid valves can be reduced, the number of wire harnesses can be reduced and the CPU circuit and control software can be simplified.

FIG. 7 shows a modified example of the cam mechanism 25. According to this modified example, the piston rod 2 of the clutch release cylinder 23 is similar to the case shown in FIG.
4, a fan-shaped cam member 40 that rotates about a pin 39 fixed to the outer surface of the case of the transmission 28 by a piston rod 24 as a fulcrum is provided in place of the cam member 26 that moves linearly. A cam follower 27 provided at the free end of the release fork lever 11 is brought into contact with the cam face 40a formed on the cam face 40a of the cam member 40 and the cam follower 27 by moving the piston rod 24 forward and backward. Released through contact with
The fork lever 11 is rotated clockwise and counterclockwise. Here, the cam surface 40a is formed such that the stroke of the release fork lever 11 is smaller than the stroke of the clutch release cylinder 23 (piston rod 24) at the location corresponding to the half-clutch region. There is.

In the above-mentioned first and second embodiments, the case where the cam mechanism is adopted as the motion transmitting mechanism has been described.
However, the present invention is not limited to this. When the motion is transmitted from the clutch booster 13 to the release fork lever 11 or from the clutch release cylinder 23 to the release fork lever 11, the push of the clutch booster 13 is important.・ Rod 14 and clutch release ・
Any mechanism may be used as long as the stroke of the release fork lever 11 is reduced with respect to the stroke of the piston rod 24 of the cylinder 23.

[0033]

As described above, according to the present invention, it is possible to improve the operability of the clutch main body in the half-clutch region without causing any trouble. According to the first aspect of the invention, the movement of the push rod is transmitted to the release fork lever by reducing the stroke of the release fork lever with respect to the stroke of the clutch pedal in the half clutch region. It is possible to set the total stroke of the clutch / pedal to be shorter than before without impairing the controllability in the half-clutch region, and the movement of the driver's legs can be controlled. It can be reduced.

According to the third aspect of the present invention, the stroke of the release fork lever is reduced with respect to the stroke of the clutch release cylinder in the half-clutch region so that the piston of the clutch release cylinder is Since the motion transmission mechanism that transmits the motion of the rod to the release fork lever is interposed, even if the piston rod of the clutch release cylinder moves fast, the release fork lever moves slowly. In order to slowly move the piston rod of the clutch release cylinder, it is not necessary to arrange multiple solenoid valves with a small throttle diameter in the clutch control solenoid valve, reducing the number of solenoid valves and reducing costs. It is possible to reduce the number of wire harnesses and reduce the number of wire harnesses.
It is possible to simplify the PU circuit and control software.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an entire clutch control system equipped with a clutch operating device according to a first embodiment of the present invention.

FIG. 2 is a schematic enlarged side view of a motion transmission mechanism portion shown in FIG.

FIG. 3 is a schematic enlarged side view showing a modified example of the motion transmitting mechanism shown in FIG.

FIG. 4 is an explanatory diagram illustrating a relationship between a stroke of a release fork lever and a stroke of a clutch pedal.

FIG. 5 is a schematic configuration diagram showing an outline of a mechanical automatic transmission equipped with a clutch operating device according to a second embodiment of the present invention.

FIG. 6 is a schematic enlarged side view of the motion transmission mechanism portion shown in FIG.

7 is a schematic enlarged side view showing a modified example of the motion transmission mechanism shown in FIG.

FIG. 8 is an explanatory diagram illustrating a relationship between a stroke of a release fork lever and a stroke of a clutch release cylinder.

[Explanation of symbols]

 10 Clutch Main Body 11 Release Fork Lever 12 Clutch Pedal 13 Clutch Booster 14 Push Rod 15, 25 Motion Transmission Mechanism (Cam Mechanism) 16, 26 Cam Member 17, 27 Cam Follow 22, 40 Cam Member 23 Clutch Release・ Cylinder 24 Piston rod

Claims (4)

[Claims] 1. A half-clutch region between a release fork lever of a clutch main body and a push rod of a clutch booster that operates the release fork lever by boosting the pedaling force of a clutch pedal. It is characterized by interposing a motion transmission mechanism that transmits the movement of the push rod of the clutch booster to the release fork lever by reducing the stroke of the release fork lever with respect to the stroke of the clutch pedal. Clutch operating device. 2. The clutch operating device according to claim 1, wherein the motion transmitting mechanism includes a cam member attached to the push rod and a cam follower attached to the release fork lever. Then, the movement of the push rod is released by engaging or abutting the cam follower with the cam groove or the cam surface of the cam member.
A clutch operating device comprising a cam mechanism for transmitting to a fork / lever. 3. A clutch clutch in a half-clutch region between a release fork lever of a clutch body and a clutch release cylinder which is connected to the release fork lever and controls connection and disconnection of the clutch body. Release for cylinder stroke
A clutch operating device characterized by interposing a motion transmitting mechanism for transmitting the motion of the piston rod of the clutch release cylinder to the release fork lever so as to reduce the stroke of the fork lever. 4. The clutch operating device according to claim 3, wherein the motion transmitting mechanism is attached to a cam member attached to a piston rod of the clutch release cylinder and to the release fork lever. A cam follower, wherein the cam follower is engaged with or brought into contact with a cam groove or a cam surface of the cam member,
A clutch operating device comprising a cam mechanism for transmitting the movement of a rod to the release fork lever.